Dredging-machine



(No Model.) 3 Sheets-Sheet 1.

M. GALLAGHER.

DREDGING MACHINE.

No. 386,309. Patented July 17, 1888.

N4 PETERS, Fbalb-ulhcgnphnn Wnlhirlgion. 04 C4 (No Model.)

3 Sheets-Sheet 2. M. GALLAGHER. DREDGI NG MACHINE. No. 386,309.

N. PETERS. Ptwlo-lilhognyher. Waihinghm D4 1;

(No Model.) 3 Sheets-Sheet 3.

M. GALLAGHER.

DREDGING MAGHINE.

No. 386,309. Patented July 17, 1888.

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UNITED STATES MICHAEL GALLAGHER,

PATENT OFFICE.

OF OHICAG O, ILLINOIS.

DREDGlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 386,309, dated July 17, 1888.

Serial No. 267,751. (No model.)

To all whom it may concern:

Be it known that l. MrcnAEL GALLAGHER, of Chicago, county of Cook, and State of Illinois,have invented certain new and useful Improvements in aDredging Apparatus,of which the following is a full, clear, and exact description that will enable others to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in that class of dredging devices that may be 0perated from the shore. The same consists of certain novel features in the construction, arrangement, and operation of the severalparis, as will be hereinafter set forth.

Figure 1 is a plan view; Fig. 2, a side elevation and partial section. Fig. 3 is an end elevation looking inward from the land. Fig. 4. shows the under side of one of the dredgingbuckets; and Fig. 5 a sectional detail of construction in the plane 5, Fig. 3.

Referring to the drawings,A represents the top horizontal framing-timber of the land end of the structure supporting the operating mechanism; A A A A*, the outside vertical timbers, and A A the central supporting ones, as shown in Fig. 3. The lower ends of the upright framing-timbers will be firmly embedded in the ground,and the upper ends connected by the cap-timber A. The main driving or power shaft B is provided with suitable journal-bearings a,'(see Fig. 3,) in the framework.

Mounted upon the shaft B, near each end and between the framing-timbers, are the friction driving-drums B B. Above the shaft B are journaled the two counter-shafts B Bflhaving the friction-dru ms a a mounted thereon and in line with the companion drums on the power-shaft. The counter-shafts B 13* have the winding-drumsO O O G mounted thereon, and to which the shore ends of the different earryin gcables a a c a are attached,whereby these cables may be slackened or strained, as required,in lowering or raising the dredgingbuekets. The opposite ends of the carryingcables are secured to the water end of the dredging structure, as shown in Figs. 1 and 2.

Below the driving-shaft B and in line therewith are journaled the counter-shafts B B,

having the friction-drums a a mounted thereon, as shown in Fig.3.

C O are cable-winding drums which are respectively mounted on the shafts B B, near their longitudinal center, bringing them midway between the windingdrums on the shafts B B. That part of the respective shafts B B B B having a bearing in the outerjournal-boxes, a, is provided with the cam-ring a, as shown in Fig. 5, so that the rotation of said shafts in one direction will bring the respective friction-drums mounted on the same in contact with the companion frictiondrums on the driving or power shaft B,for the purpose of receiving the required motion from the same, and in the opposite direction will throw the friction-drums a ae a out of engagement and up against the brake-blocks bl) b 1). (Shown in Fig. 3.) The outer ends of each of the counter-shafts are provided with the hand-opcrating lever If. The water end of the structure consists of a number of piles,D, driven into the bed D of the lake or river, and at any required distance from the shore.

D D are horizontal timbers placed on each side of the piles above the waterline D,which serve to strengthen the structure and also to provide firm holding-ground for the attachment and movement of the different wire cables. The outer ends of the carrying-cables a a c a are rigidly secured to a corresponding number of eyebolts,d,inserted in the framing-timber D The shore ends of the pulling or dredging cables (1 d are connected to the drums O" C, while the opposite or outer ends are connected to the front end of the dredgingbuckets D D The piles E E have the guidesheaves d d" journaled thereon, (see Figs. 1 and 2,) the cables d (1 running under the same and giving the downward pull necessary to embed and fill the dredging-buckets.

WVhen a bucket is loaded, the shore-cable at tached to the same may be disengaged from the depressing guide-sheave dand the bucket drawn ashore and the load discharged. One end of the cable (1 is attached to the outer end of one of the buekets,and from thence extends outward from the shore and runs over the horizontal sheaves d d, journaled in the framing-timber D of the water part of the structure, and then passes on and is secured to the IOO Q seems companion bucket. By this arrangement the buckets are alternately loaded and discharged,

one bucket going out as the other is coming in.

.It is obvious that a single bucket can be worked instead of the double arrangement shown.

The dredging-buckets are provided on the upper side with a number of sheaves, dhwhich support and suspend the same in proper relation to the carrying-cables.

The under side of the dredging bucket or buckets D is provided with the hinged discharge-bottom ed, as shown in Fig. 1. This drop-bottom is hinged atd, near the front end, and is secured in a closed position by means of the locking-bolt F,engaging with the socketeatch g. This locking-bolt runs lengthwise With reference to the bucket, and is retained in position against the under side by means of a number of staples, g, which permits of an endwise movement of said bolt. This bolt is rigidly secured near its longitudinal center to the cross-bar F, which rests closely against the under side of the bucket, the ends of said crossbar having a tripping contact with the lower ends of the levers F F, extending upward on each side of the bucket or buckets. These levers are pivoted at g to the respective sides of the buckets, and the upper projecting ends are adapted to have contact with the tripping-arms F when the buckets reach the discharging-point and the 1ocking-bolt is Withdrawn and the load automatically dumped. After the bucket is loaded the shore-eab1e d should be slackened and disengaged from the depressingsheave (1 so that the bucket may be elevated to bring the discharging'levers F F in contact with the tripping-armsF When the bucket is run out and lowered,the pressure will close the drop-bottom. The spring 9* serves to normally hold the bolt F in alocked position. The front bottom ends of the dredging-buckets are provided with the rigidly-fixed shovel-points h, which penetrate the earth and 4, facilitate the dredging and loading process. By means of this arrangement sand may be dredged along the shore for commercial purposes, or earth removed for the purpose of deepening the channel. It also provides a convenient means for deepening the channels of rivers, as the structural ends of the device may be located on opposite sides of the water. Having thus described my invention, what I claim as new, and desire to secure by Letters 5 5 Patent, is-' 1. Ina dredging apparatus, the combination, with the shore framing-timbers, of the main driving-shaft B, provided with journalbearings a in said shore structure, the friction driving-drums B B mounted on the respective ends of said driving-shaft, the countershafts B B", located above the power-shaft B, the friction-drums a a", mounted on the respective counter-shafts, the cable-drums G C 0 G the carrying-cables a a a a, having their shore ends secured to said cable-drums, the water end of the structure consisting of a number of piles and framing-timbers to which the outer ends of the carrying-cables are rigidly secured, and the dredging-buckets riding upon said cables, substantially as and for the purpose set forth. 2. In a dredging apparatus, the combination, with the shore framing-timbers, of the driving or power shaft B, provided with journal-bearings a, ofthe counter-shafts B B, journaled below said power-shaft, the frictiondrums a aimounted on said counter shafts,t-he

cable-winding drums O 0 also mounted on said shafts, the pulling-cables d d and the piles E E, the guide-sheaves d, the dredging buckets, the cable d, and the pulleys d d, one end of said cables being secured to their respective winding-drums, while the opposite end is attached to the inner or front end of the dredging-buckets, substantially as and for the purpose set forth.

3. In a dredging-machine, the combination, with the power-shaft B and the friction driving-drums B B of the several counter-shafts arranged above and below said shaft B, the V friction-dru ms mounted on said counter shafts, the cam-ring a, formed on the respective outer ends of said counter-shafts, the brake'blocks b b b b and the lever or levers b whereby the friction-drums on the counter-shaft may be thrown into and out of contact with the con1- panion drums on the power shaft and the operation of the same fully controlled, substantially as and for the purpose set forth.

4. Thecombination, withadredging-bucket, of the hinged drop-bottom d, the locking-bolt F, the socket-catch g, the spring the crossbar F, the vertical levers F F, and the tripping-arms F substantially as and for the pur- 5 pose set forth. 0

lOO

. m MICHAEL GALLAGHER.

mark. "Witnesses:

L. M. FREEMAN, L. B. OoUPLAND. 

